Multiple drilling-machine



5 Sheets--Sheet 1 (No Model.)

B HAMMOND MULTIPLE DRILLING MACHINE.

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R. HAMMOND. MULTIPLE DRILLING MAGHINE.

No. 398,962. Patented Mar 5, 1889 INVENTOR,

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(No Model.) 5 sheets-Sheet 3. R. HAMMOND.

MULTIPLE DRILLING MACHINE.

No. 398,962. g I Pa Mar. 5. 1889.

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5 Sheets-Sheet 4. R. HAMMOND. MULTIPLE DRILLING MAGHINE.

Patented Mar. 5, 1889.

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Sheet 5.

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B HAMMOND.

MULTIPLE DRILLING MACHINE.

No. 398,962. Patented Mar. 5, 1889.

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UNTTnn STATES aTnNT @rrrcn.

RICHARD HAMMOND, OF BI FFALO, NElV YORK.

MULTIPLE DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent N 0. 398,962, dated March5, 1889.

Ap li ti 1 1 May 29, 1888. Serial No. 275,428. (No model.)

To aZZ whom, it may concern:

Be it known that. I, RICHARD HAMMOND, of llulfalo, in the county of Erieand State of New 'Y ork, have invented a new and Improved MultipleDrilling-Machine, of which the following is a full, clear, and exactdescription.

The object of the invention is to provide a new and improved multipledrilling-machine especially adapted for drilling apertures for therivets in boiler or other plates after the latter are formed and inplace, so as to perfectly match the apertures in the plates to befastened together.

The invention consists of a central drillingtool and of two outerdrilling-tools held parallel with the said central drilling-tool andmounted in bearings held to swing from the said central drilling-tool.

The invention also consists of certainparts and details and combinationsof the same, as will be fully described hereinafter, and then pointedout in the claims.

Reference is to be had to the accompanyin drawings, forming a part ofthis specification, in which similar letters of reference indicateeorrespomling parts in all the figures.

Figure l is a side elevation of the improvement as applied, showing theboiler-plates in section. Fig. 2 is a ltmgitudinal sectional elevationof the same. Fig. 3 is an enlarged sec tional elevation of thedrill-head. Fig. i is a plan view, partly in section, of the rear end ofthe improvement. Fig. 5 is an enlarged sectional end elevation of theimprovement on the line a: a; of Fig. 2. Fig. 6 is an inverted plan viewof the drill-block; and Figs. 7, 8, f), and 10 show ditlerentarrangements of the holes as bored by the machine. Fig. 11 is a sideelevatimi of theimprovement as applied.

On the base plate A are secured the columns l and .0, of which theformer is provided on its upper end with a head, .13, in the top ofwhich is mounted to rotate in suitable bearings the longitudinaldrivingshaft. D, provided with the usual pulleys, D, connected by a beltwith suitable machinery for imparting a rotary motion to the saiddriving-shaft D. In the middle of the shaft Dis secured a pinion, Dmeshing into a gear-wheel, D provided with a hub, I), mounted to rotatein the bearings B formed in the middle of the head 13.

The huh I) is provided with a fixed key fitting into a groove, E, formedlongitudinally in the drill-shaft E, passing through the said hub D", sothat the rotary motion of the gearwheel D is transmitted to the saidshaft E, and the latter is at the same time permitted. to slidelongitudinally in the hub of the said gear-wheel D". On the outer end ofthe shaft E is secured the drilling-tool F, of any approvedconstruction, and. near the outer end of the said shaft is secured agear-wheel, G, meshing into the geai wheels G and G secured on theshafts G and G", respectively, carrying at their outer ends thedrilling-tools F and F respectively, held parallel with the centraldrilling-tool, F, and at equal distances from. the same.

The shafts G and (-lare mounted to rotate in suitable bearings, ll andII, respectively, each being made, preterably, in two pieces and in. Ushape, and having its ends pivoted on the central d rill-shaft, E, as isplainly illustrated in Figs. 3 and Thus the bearings ll and ll" can beturned on the central shaft, E, so that the drilling-tools 1* and Frespectively, carried by the said bearings H and ll, respectively, willalways remain equidistant from the said central drilling-tool, F. TheU-shaped bearings ll and ll are provided at their middle part withlongitudinal bolts J and J, respectively, each having a head, J passinginto an annular groove, K formed in the face-plate K, provided with arearwardly-extendi n g hub, K, through which passes the central shaft,E, having a box, L, fitting into the said hub K, and resting on one sideof a collar, E formed on the said central shaft, E. One end of thebearing H, above mentioned, rests on the other side of the said collar Eand the other bearing, H, is prevented from shifting longitudinally by acollar or nut, ll screwing on the front end of the central shaft, E, asis plainly shown in Figs. 2 and 3.

On the outer ends of the bolts .1 and J screw the nuts J, so as tofasten the respect.- ive bearings ll and ll firmly to the face-plate Kby adjusting the said nuts If. ()n the sides of the bearings ll ll. areformed flanges, through which pass additional bolts, H, extending intothe annular slots K and serving to assist in securing the bearings ll Hto the said face-plate K. The latter is secured by bolts K to a collar,N, provided with a hub, N extending rearward ly concentric with theshaft E and the hub K, before mentioned. In this hub N are formedlongitudinal slots N into which project the keys B secured on a hub, Bprojecting from the front end of the box B, and arranged concentricallywith the bearings D and the central shaft, E. Thus the hub N surroundsthe hub B and the latter-surrounds the hub K, and through the latterpasses the central shaft, E.

On the outside of the hub N is formed a thread, N on which screws a nut,0, provided with a hand-wheel, O, for turning said nut, and the latteris provided with an annu lar groove, 0 formed near its rear end. Intothis annular groove O fits a split ring, P, secured in the bracketP,fastened in any suitable manner to the front end of the head B Thuswhen the hand-wheel O is turned it imparts a like motion to the nut O,which revolves'in the stationary split ring P, so that the hub N ismoved forward or backward longitudinally, according to the direction inwhich the hand-wheel O is turned. The outward movement of the hub Ncauses a like movement of the face-plate K, the shaft E, and thebearings H. and 11, carrying the drilling-tools F and F The hub Nisprevented from turning on account of the stationary keys B engagingcorresponding slots in the said hub N.

In the column O is held to slide longitudinally a sleeve, O, adapted tobe secured at any convenient height by a set-screw, O screwing into thecolumn 0 against the outside of the sleeve O. On the top of the sleeve Ois held to slide forward and backward a frame, Q, carrying in its frontend a transverse wooden block, Q, adapted to rest against the inside ofthe inner plate, R, to be bored and riveted in connection wit-l1 theplate R, held on the outside of the said plate R.

The plates 'R and R form the boiler-shell R suspended at its upper endon the chains T, secured to a swivel, U, held on the sheave U, supportedby the chain U extending upward and over pulleys on the carriage V,mounted to travel on the frame \V, held to travel on tracks supported bythe posts XV. One end of the chain U is secured to a fixed block, U heldon the frame V, and the other end of the chain U is connected with ahydraulic ram, U", or other suitable means for raising or lowering thesheave U and th boiler-shell R The carriage V can be moved forward andbackward on the frame TV by a chain, V, connected with its ends to thesaid carriage and passing over the pulleys V and V", mounted on theframe \V, and of which one is rotated bya chain or rope, V, passing overa large pulley on the shaft of the said pulley V".

The operation is as follows: The plates, R and R, to be riveted togetherare formed in the desired shape, then fitted over each other andtemporarily secured in this position by suitable means. The plates R andR are then passed between the block Q and the drilling-tools F, F, andF, the latter being set to drill apertures in the said plates R and Rand arranged in any desired manner, as illustrated in Figs. 7, 8, S),and 10that is, the drilling-tools F, F, and F may be set directly aboveeach other, as illustrated in Figs. 1, 2, 3, and 5, so as to drillsimultaneously three apertures located one above the other in a straightline, as shown in Fig. 9. By loosening the nuts J on the bolts J and Jthe bearings H and H may be swung up or down, so as to stand at rightangles to each other. Thereby the drilling-tools F, F, and F cansimultaneously form apertures in the plates R and R, as illustrated inFigs. 7 and S. The bearings H and H, after being swung to the desiredposition, are again fastened to the front plate, K, by adjusting thenuts J The bearings H may also be set so that the drilling-tools F and Fare above and below the central drilling-tool, F, whereby the threedrillingtools form simultaneously apertures in the boiler-plates R andR, as illustrated in Fig. 10.

The plates R and R, forming the shell, are suspended, as shown anddescribed, and are raised or lowered by the ram U The shell can beturned the desired distance for drilling a new set of apertures, as theswivel U permits such motion. The carriage V isadj usted on the frame \Vaccording to the diameter of the shell R so as to bring the respectiveplates R and R directly out on the block Q.

The rotary motion of the driving-shaft B is transmitted by the pinion Dand the gearwheel D to the central shaft,E,whieh,bythe gear-wheel G,meshing into the gear-wheels G and G imparts a rotary motion to theshafts G3 and G", carrying the drilling-tools F and F so that the threedrilling-tools F, F, and F are rotated simultaneously but the centraldrilling-tool, F, rotates in an opposite direction from thedrilling-tools F and F so that the latter are formed either right andleft handed and the central tool left or right handed. The operator thentakes hold of .the hand-wheel O and turns the same'so as to impart aforward sliding motion by the nut O to the hub N, carrying theface-plate K, on which are secured the bearings H and H, and whichface-plate, in connection with the bearings, carries the central shaft,E, forward by means of the collar E resting between the said bearing Hand the face-plate K. Thus the three drilling-tools F, F, and F areadvanced simultaneously, and also receive a simultaneous rotary motion.The drillingtools can thus drill into the outer plate, R, and thenthrough the inner plate, R, thus forming three apertures at a time, saidapertures being lo rated in such a position in relation to each other asabove described in reference to Figs. 7, 8, .l, and lb.

The block Q in the frame Q is held directly in front of the tools, sothat the latter, after boring through the inner plates, It, pass intothe said block Q to prevent the tools from breaking. \Yhen the holes aredrilled, the operator turns the hand-wheel O in an opposite direction,so that the drilling-tools F, F, and F pass out of contact with theplates it and It, after which the said plates are turned, raised, orlowered the required distance, and the above operation repealed to drillanew set of holes in the said plates. Thus three holes are drilled inthe said plates simultaneously, as shown in Fig. 7, S, 9, or it], or anyother angle. If it is desirable to drill only two holes, any two of thethree drillinglools may be used for this purpose; but when it is desiredto drill only one hole, then either one of the three drilling-tools maybe used.

ldo not limit myself to the peculiar construct-ion shown for raising orlowering the plates R- and R, forming the shell R as any suitablehoisting mechanism can be en'iployed.

l have tiled a separate application, Serial 99, for the method involvedin the operation of this machine.

Having thus described my invention, whatl claim as new, and desire tosecure by Letters llatcnt, is"

1. In a drillinganaehine, the combination, with a centraldrilling-toohot' two outer drilling-tools held parallel with the saidcentral drilling=tool and mounted in bearings held to swing from thesaid central drilling-tool, substantially as shown and described.

2. In a drilliug-machine, the combination, with a central shaft carryinga. drilling-tool, of two outer parallel shafts rotated from the saidcentral shaft and mounted in bearings pivoted on the said central shaft,substantially as shown and described.

3. In a drilliug-machine, the combination, with a central shaft carryinga drilling-tool, of two outer parallel shafts, each carrying adrilling-tool and rotated from the said central shaft, and bearingscarrying the said outer shafts and pivoted on the said central shaft,substantially as shown and described.

in In a drilling-machine, the combination, with a face-plate, of acentral shaft held to rotate in the said face-plate and carrying adrilling-tool, two outer parallel shafts, each carrying a drilling-tooland rotated from the said central shaft, and bearings carrying the saidouter shafts pivot-ed on the said central shaft, said bearings beingadapted to be secured to the said face-plate, substantially as shown anddescribed.

5. In a drilling-machinc, the combination, with a face-plate mounted toslide forward and backward, of a central shaft passing through the saidface-plate and carrying a drilling-tool, two outer parallel shafts,each, carrying a drillingtool. and rotated from the said central shaft,and bearings carrying the said outer shafts and pivoted on the said.central shaft and adapted to be secured to the said face-plate,substantially as shown and described.

o. In a drilling-machine, the combination, with a face-plate and means,substantially as described, for imparting a forward and backward slidingmotion to the said face-plate, of a central shaft passing through thesaid faceplate and carrying a. drillingtool, two outer parallel shafts,each carrying a drilling-tool and rotated from the said central shaft,and bearings carrying the said outer shafts and pivoted on the saidcentral shaft and adapted to be secured to the said face-plate,substantially as shown and described.

7. In a drilling-1nachine, a face plate mounted to slide forward andbackward and provided with an annular slot, in combination with acentral shaft mounted to rotate in the said face-plate and slidingforward and backward with the same, two outer parallel. shafts rotatedfrom the said central shaft, bearings carrying the said outer shafts andpivoted on the said central shaft, and bolts passing into the saidannular slots and through the said bearings to secure the latter to thefaceplate, substantially as shown and described.

S. In a drilling machine, a face plate mounted to slide longitudinally,a central shaft mounted to rotate in and sliding with the saidface-plate, two outer parallel shafts rotated from the said centralshaft, and bearings carrying the said outer shafts and pivoted on thesaid central shaft and connected with the said face-plate, anddrilling-tools secured to the said central and outer shafts, incombination with a wooden block held in front of the saiddrilling-tools, a frame carrying the said block. and mounted to slidehorizontally, a table in which the said frame is held to slide, a sleevecarrying the said table, and a column in which the said sleeve is heldvertically adjustable and mounted to turn, substantially as shown anddescribed.

' RICHARD I IAMMOND.

Witnesses:

JOHN Coon, F. \V. THOMPSON.

